Version 0.2.04		(to be released with Thalasss 0.3.70)
   - removed "extra" copyright comments from Makefile and text2text.cpp
   - some comments added to clarify HTML4 entity-related matters
   - added a paranoid check for arguments' correctness to attrname_allowed
Version 0.2.03
   - fixed a bug of starting a paragraph right before the closing tag
     of those where replacement is disabled
Version 0.2.02		(released with Thalassa 0.3.52)
   - added a workaround for the case when a paragraph starts
     with a tag which may belong to a paragraph (e.g., em, cite, span, ...)
Version 0.2.01		(released with Thalassa 0.3.51)
   - fixed some bugs in FSMs in stfhtml.*
Version 0.2.00		(released with Thalassa 0.3.50)
   - added the possibility of tag attribute filtering
Version 0.1.01          (released with Thalassa 0.2.*, 0.3.*)
   - cleaned off trailing spaces from the code
Version 0.1.00		(released with Thalassa 0.1.00 .. 0.1.10)
   - the very first published version
